First coarse run to fix coding style in locm3.

Added --terse and --mailback options to the make stylecheck target. It
also does continue even if it enounters a possible error.

We decided on two exceptions from the linux kernel coding standard:
- Empty wait while loops may end with ; on the same line.
- All blocks after while, if, for have to be in brackets even if they
  only contain one statement. Otherwise it is easy to introduce an
  error.

Checkpatch needs to be adapted to reflect those changes.

lib/lpc43xx/scu.c

@@ -34,13 +34,17 @@ LGPL License Terms @ref lgpl_license
 
 #include <libopencm3/lpc43xx/scu.h>
 
-/* For pin_conf_normal value see scu.h define SCU_CONF_XXX or Configuration for different I/O pins types */
+/* For pin_conf_normal value see scu.h define SCU_CONF_XXX or Configuration for
+ * different I/O pins types
+ */
 void scu_pinmux(scu_grp_pin_t group_pin, u32 scu_conf)
 {
 	MMIO32(group_pin) = scu_conf;
 }
 
-/* For other special SCU register USB1, I2C0, ADC0/1, DAC, EMC clock delay See scu.h */
+/* For other special SCU register USB1, I2C0, ADC0/1, DAC, EMC clock delay See
+ * scu.h
+ */
 
 /* For Pin interrupt select register see scu.h SCU_PINTSEL0 & SCU_PINTSEL1 */